I think he has potential. He has the basic things that very good players have -- he returns very well, moves very well, and has a lot of different strokes/shots. He's learning how to put them together at this level. I agree with the critics who say he has to be more aggressive, but I can also see why he has to feel his way toward that goal. It isn't easy at his age to look around, see almost nobody playing a net/midcourt game with much frequency, and then decide that is the way to go. He has a huge forehand and should use it more. He needs to work on his first serve. As Nadal has shown, these are things that you can really get better at.